JPH0126955Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a hose joint used to connect hoses to each other or to a water pipe faucet or the like.

Conventional technology and its problems This type of hose joint, for example,
As disclosed in Japanese Patent No. 38900, a locking member that protrudes into the female member through an oblique oblong hole in the peripheral wall of the female member and that locks the male member in the female member is attached to the female member. It consists of an arc-shaped cover piece that fits around the outer periphery, and an inclined fitting piece that is provided on the inner surface and has a crescent-shaped front face and is equiangular to the long hole. An outer cylinder that is pressed forward by a spring acting on the rear end of the cover and has an inner flange that touches the front end of the cover, and is a device that can be pushed rearward at will. It has been known. This allows the female member to be pulled out lightly, smoothly, and reliably from the female member without any resistance, and also prevents the engagement and restraint between the two members from being released automatically. It has the advantage of having a high degree of safety in securing
There is a problem in that the assembly work of each member is troublesome. That is, when assembling each member, especially when fitting the outer cylinder onto the female member, the push spring is held in a compressed state and the locking member is fitted into the elongated hole to cover the push spring and the locking member. Since it is necessary to fit and cover the female member with the outer cylinder, the locking member may become detached from the elongated hole and fall off.

The object of this invention is to provide a hose joint that allows easy assembly of the members constituting the hose joint.

Means for Solving the Problems As shown in the attached drawing, the hose joint according to this invention has one joint member 2 having a tubular receiving part 1 and a tubular insertion part 3 inserted into the receiving part 1. The other joint member 4, the locking member 5 attached to the outer surface of the receiving part 1 and connecting both joint members 2 and 4, and the locking member 5 that is fitted onto the receiving part 1 so as to cover the locking member 5 and is attached to the receiving part 1. A cylindrical member 6 is movable in the axial direction of the receiving part 1, and a plurality of through holes 14 are formed at equal intervals in the circumferential direction of the receiving part 1, and an insertion part is provided opposite to each through hole 14. A recess 34 is formed on the outer surface of the locking member 5.
are integrally formed from an elastic synthetic resin, and are fitted into each of the through holes 14 and have inner tips protruding inward of the receiving portion 1 to form the recesses 34.
A plurality of locking portions 42 are fitted into the outer surface of the receiving portion 1, and a plurality of locking portions 42 are curved along the circumferential direction of the outer surface of the receiving portion 1. The cylindrical member 6 is made up of an arcuate arm portion 43 and a plurality of connecting portions 44 that connect opposing ends of adjacent arm portions 43 and apply forward elastic force to the ends. A plurality of inward protrusions 51 are provided at the ends of each arm 43, respectively, to abut from the front side.

Embodiment The hose coupling includes one coupling member 2 having a tubular receiving part 1, the other coupling member 4 having a tubular insertion part 3 inserted into the receiving part 1, and a coupling member 4 attached to the outer surface of the receiving part 1 and having both parts. It includes a locking member 5 connecting the joint members 2 and 4, and a cylindrical member 6 that is fitted onto the receiving part 1 so as to cover the locking member 5 and is movable in the axial direction of the receiving part 1. There is.

Each of these members 2, 4, 5, and 6 is integrally molded from an elastic synthetic resin.

The tubular receiving portion 1 occupies approximately the front half of one of the joint members 2, and has a large diameter portion 7, an intermediate portion 8, and a small diameter portion 9 that are successively connected from the front through stages on its inner circumferential surface. It is provided. A front end collar 10 is provided at the front end of the outer peripheral surface of the receiving portion 1, and three rear protrusions 11 are provided at equal intervals on the rear end surface of the front end collar 10, flush with the outer surface of the front end collar 10. Three guide grooves 12 are provided on the outer surface of the front end flange 10 at positions that are 60 degrees out of phase with the three rear protrusions 11, and extend rearward from the rear end of each guide groove 12. Three protrusions 13 having the same height as the groove bottom are provided on the outer surface of the receiving part 1.
In the receiving part 1, three through holes 14 are formed in a row on the rear surface of the three rear protrusions 11, respectively. Each through hole 14 has a substantially square shape when viewed from the front, and its front surface 15 is substantially perpendicular to the axial direction of the receiving portion 1, but its rear surface 16 is inclined so as to face obliquely upward. One of the joint members 2 is provided with an intermediate cylindrical portion 17, an intermediate flange 18, and rear end inner and outer cylindrical portions 19, 20 in order from the front following the rear end of the receiving portion 1. The intermediate cylindrical portion 17 is connected to the receiving portion 1 via a step 21,
Its outer shape is the same as that of the front end collar 10. Three rear protrusions 11 are provided on the outer peripheral surface of the intermediate cylindrical portion 17.
three guide grooves 2 so as to be located on the rear extension line of
2 is provided. The rear end inner cylinder part 19 projects further rearward than the rear end outer cylinder part 20, and an annular tapered part 23 is provided at the rear end of the outer peripheral surface of the projection part. One end of one of the hoses 24 to be connected is fitted over the rear end inner cylinder portion 19. Rear end outer cylinder part 2
A male thread 25 is provided on the outer circumferential surface of 0, and a cap nut 26 is screwed into this. A through hole 27 through which the hose 24 is inserted is formed in the top wall of the cap nut 26. The inner peripheral surface of the through hole 27 is formed in a tapered shape corresponding to the annular taper section 23, and the tapered surface presses down the portion of the hose 24 that is fitted into the annular taper section 23 from the outside. Thereby, the hose 24 is prevented from coming off from the rear end inner cylindrical portion 19.

The tubular insertion part 3 occupies almost the rear half of the other joint member 4, and the receiving part 1 is provided on its outer peripheral surface.
A large diameter portion 28, a medium diameter portion 29, and a small diameter portion 30 are provided in correspondence with the inner circumferential surface of the holder, which extend successively through stages from the front. The tip of the small diameter portion 30 protrudes rearward from the receiving portion 1, and between the outer circumferential surface of the protruding portion and the inner circumferential surface of the intermediate cylindrical portion 17, an annular packing 31 with a backward U-shaped cross section is provided with a stepped rear end. It is interposed in a state in which it is in contact with 21. An annular groove 32 is formed in the middle of the outer circumferential surface of the small diameter portion 30, and an O-ring 33 is fitted in this annular groove 32.
An annular recess 34 is formed in the outer circumferential surface of the medium diameter portion 29, leaving a portion of the entire rear end thereof. Of both the front and rear sides 35, 36 of the recess 34, the front side 35 has a smooth curved surface, but the rear side 36 has the same shape as the rear side 16, which is inclined so as to face obliquely upward in front of the through hole 14. It forms an extended slope. Although not shown in detail, the other joint member 4 is provided with an intermediate cylindrical portion 37, an intermediate flange 38, and a front end cylindrical portion 39 following the front end of the insertion portion 3 in this order from the rear. A male thread 40 is provided on the outer peripheral surface of the front end cylindrical portion 39, and a cylindrical connecting member 41 is screwed into this. This connecting member 41 connects the other joint member 4 to the tip of a faucet (not shown) or the like.

The locking member 5 has three locking portions 4 that are respectively fitted into the three through holes 14 and whose inner tips protrude inward of the receiving portion 1 and are fitted into the recesses 34.
2, three arcuate arm portions 43 each having an outer proximal end of each locking portion 42 at an intermediate portion of its length and curving along the circumferential direction of the outer surface of the receiving portion 1; and each curved portion 43. It consists of three connecting parts 44 that respectively connect opposing ends of adjacent ones and apply a forward elastic force to the same ends. The locking portion 42 has a substantially rectangular shape with a diagonally forward longitudinal section, and its front surface 45 is in close contact with the front surface 15 of the through hole 14 and the rear end surface of the rear protrusion 11 above it, and the rear surface 46 is the rear surface 16 of the through hole 14
and the rear side surface 36 of the recess 34 below it. Further, both inner and outer surfaces 47, 4 of the locking portion 42
8 are parallel to each other and are both inclined in a direction perpendicular to the rear surface 46. The arm portion 43 has a substantially uniform square cross section over its entire length, and rectangular parallelepiped projections 49 are provided at both ends of the arm portion 43 so as to be perpendicular to the arm portion 43 . Each protrusion 49
sandwich each protrusion 13 of the receiving portion 1 from both sides. Further, the outer surface of the protrusion 49 is formed into a rearwardly inclined surface. The connecting portion 44 has a rectangular shape with a substantially uniform cross section over its entire length, but when viewed from the direction directly opposite to the connecting portion 44, it has an oval shape that is elongated in the direction perpendicular to the axial direction of the receiving portion 1, and It forms a semicircle when viewed from the orthogonal direction. The outer end of the locking part 42 is flush with the outer peripheral surface of the front end collar 10 of the receiving part 1, but the outer end of the protrusion 49 projects further outward than the outer peripheral surface of the front end collar 10. The rear end portion of each connecting portion 44 is connected to a step 2 at the boundary between the receiving portion 1 and the intermediate cylindrical portion 17.
1, and a rear protrusion 50 is provided at the abutting portion.

The inner circumferential surface of the cylindrical member 6 is connected to the front end flange 10 of the receiving part 1.
and is formed in a size that fits loosely into the outer circumferential surface of the intermediate cylindrical portion 17. The inner circumferential surface of the cylindrical member 6 has three inward protrusions 51 at equal intervals on its front end.
and three inward protrusions 52 extending from the middle of each inward protrusion 51 over the entire length of the cylindrical member 6. Each inward protrusion 51 fits into each guide groove 12 of the front end collar 10 and abuts each protrusion 49 of the locking member 5 from the front side. Each inner protrusion 52 is connected to the locking portion 42 of the locking member 5.
The rear end portions are fitted into the guide grooves 22 of the intermediate cylindrical portion 17, respectively. Further, on the inner circumferential surface of the cylindrical member 6, as shown in FIGS. 2 and 7, there is a groove located between each of the inner protrusions 51 and the inner protrusions 52 when viewed from the axial direction. Six retaining protrusions 53 are provided so as to be located slightly rearward of the side protrusion 51, and each protrusion 53 is engaged with the front end flange 10 of the receiving part 1 from the rear side. At the rear of the outer peripheral surface of the cylindrical member 6, there is a step 54 for holding a finger.
is provided.

An annular gap 55 is provided between the receiving part 1 and the cylindrical member 6, which is surrounded by the outer peripheral surface of the former, the inner peripheral surface of the latter, the rear end surface of the front end collar 10, and the front end surface of the step 21. This gap 55 accommodates the locking member 5 and is free to deform as will be described later.

When the cylindrical member 6 is pushed backward from the state shown in FIG. to move. As a result, each arm portion 43
It is twisted in the direction shown by the arrow in the figure. As a result, each of the locking parts 42 rotates about the arm part 43 in the same direction as the direction in which it is twisted, and the tip of the locking part 42 comes out of the recess 34. In this state, when both the joint members 2 and 4 are pulled apart from each other,
The insertion part 3 comes out from the receiving part 1.

To connect both the joint members 2 and 4, when the insert part 3 is forcibly pushed into the receiving part 1, the tip of the insert part 3 pushes the inner side 47 of the locking part 42, and the locking part 42 is released. being pushed in a direction. Then, each arm portion 43 is twisted against the elastic force of the connecting portion 44 as described above, thereby causing the locking portion 42 to rotate and its tip to move out of the receiving portion 1. When the insertion part 3 is pushed in to a position where the recess 34 faces the through hole 14, the force that pushes the locking part 42 outward is no longer applied to the locking part 42, so that the connection acting on the arm part 43 stops. When the arm portion 43 is unscrewed by the elastic force of the portion 44, the locking portion 42 rotates and its tip protrudes into the receiving portion 1 again and fits into the recess 34. As a result, the rear surface 4 of the locking portion 42 is attached to the rear surface 36 of the recess 34.
6, the insertion part 3 will not come out from the receiving part 1 even if both the joint members 2 and 4 are pulled in the direction of separating them from each other.

Next, the procedure for assembling the hose joint will be explained. It is now assumed that the joint members 2 and 4, the locking member 5, and the cylindrical member 6 are separated from each other. First, each connecting part 44 of the locking member 5 is pushed apart so that the rear ends are separated from each other and fitted onto the receiving part 1, and then each arm part 43 is similarly spread and fitted onto the receiving part 1 while each of the connecting parts 44 is pushed apart so that the rear ends are separated from each other. The stop portions 42 are respectively fitted into the through holes 14. Then, each locking portion 42
Each arm portion 43 is inserted into the through hole 14.
Since the connecting portion 44 is wrapped around the outer surface of the receiving portion 1, the locking member 5 will not accidentally fall off from the receiving portion 1. In this way, the cylindrical member 6 is attached to the receiving part 1 so that its inward protrusion 51 fits into the guide groove 13 of the front end collar 10 and its inward protrusion 52 fits into the guide groove 22 of the intermediate cylindrical part 17. Fit and cover. At this time, the retaining protrusion 53 of the cylindrical member 6 deforms outward when getting over the front end flange 10, but after getting over it, it returns to its original state and is locked to the rear end surface of the front end flange 10. . This prevents the cylindrical member 6 from slipping out from the receiving portion 1.

Effects of the invention According to this invention, the locking member for connecting the receiving part and the insertion part is composed of a locking part, an arm part, and a connecting part integrally formed of elastic synthetic resin. , when assembling the hose joint,
To provide a hose joint that can be easily assembled since the locking member does not accidentally fall off from the receiving part.

[Brief explanation of drawings]

The drawings show an embodiment of this invention, in which Fig. 1 is a partially fragmented longitudinal sectional view, Figs. 2 and 3 are sectional views taken along the - line and - line of Fig. 1, respectively, and Fig. 4 is a cylindrical member. side view with removed, 5th
6 and 6 are cross-sectional views taken along lines - and - in FIG. 4, respectively, and FIG. 7 is a sectional view taken along lines - and - in FIG.
This is a cross-sectional view along the line. 1... Receiving part, 2, 4... Joint member, 3... Insertion part, 5... Locking member, 6... Cylindrical member, 1
4... Through hole, 34... Recess, 42... Locking part,
43...Arm part, 44...Connecting part, 51...Inward protrusion part.

Claims (1)

[Scope of utility model registration request] One joint member 2 having a tubular receiving part 1, the other joint member 4 having a tubular insertion part 3 inserted into the receiving part 1, and both joint members 2, 4 attached to the outer surface of the receiving part 1. It includes a connecting locking member 5 and a cylindrical member 6 that is fitted over the receiving part 1 so as to cover the locking member 5 and is movable in the axial direction of the receiving part 1. A plurality of through holes 14 are formed at equal intervals in the circumferential direction, and
A recess 34 is formed in the outer surface of the insertion part 3 so as to face each through hole 14 , and the locking member 5 is integrally formed of elastic synthetic resin and is provided in each through hole 14 . A plurality of locking portions 42 are fitted into the recess 34 with inner tips protruding inwardly of the receiving portion 1, and outer proximal ends of each locking portion 42 are provided at the intermediate portions of the lengths. A plurality of arcuate arms 43 are curved along the circumferential direction of the outer surface of the receiving part 1, and the opposing ends of adjacent arms 43 are connected to each other, and a forward facing end is connected to the opposite end of each arm 43. This hose joint is composed of a plurality of connecting parts 44 that each apply an elastic force, and the cylindrical member 6 is provided with a plurality of inwardly protruding parts 51 that abut the ends of each arm part 43 from the front side.